MEASURING YOUR TUNNEL HOW WIDE IS YOUR TUNNEL? TUNNEL WIDTH IN FEET 10 TUNNEL WIDTH IN METRES HOW IS YOUR SHEET FIXED AT THE SIDES? TRENCHED BASE RAIL MID RAIL 3.1 12 3.7 14 4.3 16 4.9 18 5.5 SHEET WIDTH REQUIRED IN METRES TO COVER YOUR TUNNEL 7.3 7.3 7.3 7.3 7.3 7.3 9.2 7.3 7.3 11.1 9.2 7.3 11.1 9.2 7.3 11.1 11.1 9.2 14 14 11.1 14 14 11.1 14 14 11.1 TUNNEL LENGTH? SHEET LENGTH REQUIRED TO COVER YOUR TUNNEL IS CALCULATED AS THE LENGTH OF YOUR TUNNEL +1 WIDTH. ADD EXTRA AS NEEDED FOR DOORS. FEET 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120 125 130 135 140 145 METRES SHEET LENGTH REQUIRED IN METERS INCLUDING ENDS 5 6 8 9 11 12 14 15 17 18 20 21 23 24 26 27 29 31 32 34 35 37 38 40 41 43 44 8 9 11 12 14 15 17 18 20 21 23 24 26 27 29 31 32 34 35 37 38 40 41 43 44 46 47 8 10 11 13 14 16 17 19 20 22 24 25 27 28 30 31 33 34 36 37 39 40 42 43 45 46 48 9 10 12 13 15 16 18 20 21 23 24 26 27 29 30 32 33 35 36 38 39 41 42 44 46 47 49 9 11 13 14 16 17 19 20 22 23 25 26 28 29 31 32 34 35 37 38 40 42 43 45 46 48 49 10 12 13 15 16 18 19 21 22 24 25 27 28 30 31 33 35 36 38 39 41 42 44 45 47 48 50 11 13 14 16 17 19 20 22 23 25 26 28 29 31 32 34 35 37 38 40 42 43 45 46 48 49 51 12 13 15 16 18 20 21 23 24 26 27 29 30 32 33 35 36 38 39 41 42 44 46 47 49 50 52 13 14 16 17 19 20 22 24 25 27 28 30 31 33 34 36 37 39 40 42 43 45 46 48 49 51 53 13 15 16 18 20 21 23 24 26 27 29 30 32 33 35 36 38 39 41 42 44 46 47 49 50 52 53 14 15 17 18 20 21 23 24 26 27 29 31 32 34 35 37 38 40 41 43 44 46 47 49 50 52 53 15 16 18 19 21 22 24 25 27 28 30 31 33 35 36 38 39 41 42 44 45 47 48 50 51 53 54 - 14 14 - - 14 21 6.4 24 7.3 27 8.2 29 8.9 30 9.2 33 10.1 71 CALL 01270 212 726 POLYHOUSES, COVERS & SPARES
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